Grinding-mill.



No, 757,097. v PATENTED APR. 12, 1904. W. G. DEARDS, W. E. 'COPENHAVER & D. L. ADELSPERGER.

GRINDING MILL.

7 APPLICATION FILED NOV. 6, 1901. N0 MODEL. a SHEETS-SHEET 1.

. J2 as 60 M I W WITNESSES 1N VEN TOR? No. 757,097. PATBNTED APR. 12, 1904. W. G. DEARDS, W. E. GOPENHAVER & D. L. ADELSPERGER.

- GRINDING MILL.

APPLICATION FILED NOV. 6, 1901.

N0 MODEL. 3 SHEETS-SHEET 2.

I W ATTORNEK TNE NORRIS PETER no NOT LITHO ASHINGION D L PATENTED APR. 12, 1904.

GRINDING MILL.

APPLIUATION FILED NOV. 6, 1901.

3 SHEETSSHEET 3.

N0 MODEL.

INVENTO I i t j t I \J, 1 I ATTORNEY WITNESSES Patented Apr-i112, 1904.

UNITED STATES PATENT OFF-ICE.

WILLIAM C. DEABDS, WILLIAM E. OOPENHAVER, AND DOW L. ADEL- SPERGER, OF SPRINGFIELD, OHIO, ASSIGNORS TO THE FOOS MANUFACTURING COMPANY, OF SPRINGFIELD, OHIO, A CORPO- RATION OF OHIO.

"GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 757,097, dated April 12, 1904.

' A ii ion fil d November 6,1901. SerialNo. 81,308. on model.)

To all whom it may concern:

Be it known that we, WILLIAM C. DEARDS, WILLIAM E. COPENHAVER, and Dow L. ADEL- SPERGER, citizens of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Grinding-Mills, of which the following is a specification, reference being bad therein to the accompanying drawings.

This invention relates to grinding-mills, and

more particularly to that class of mills knownas sweep-mills, and has for itsobgect, first,

to provide for the more eflicient lubrication of the gearing by means of which the inner and outer grinding-rings of the mill are driven in opposite directions, and, second, to provide a construction whereby the opening of the mill to give access to its interior may be facilitated. I

To these and other ends our invention con sists in certain novel features, which we will now proceed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of a mill embodying our'invention, the same being shown open. Fig. 2

is a perspective view of the mill closed. Fig.

3 is a central vertical sectional view. Fig. I is a detail plan section taken on the line was of Fig. 3. Fig. 5 is a detail plan section taken on the line y y of Fig. 3. Fig. 6 is a detail plan section taken on the line 2 z of Fig. 3. Fig. 7 is a plan section taken on the line .2 a of Fig. 3. Fig. 8 is a detail elevation giving aside view of one of the hinge members, and Fig. 9 is a detail elevation giving a rear elevation of the same.

7 extending upward therefrom and forming, in

connection with the base-plate, a reservoir or receptacle adapted to receive the master-wheel and the gearing by means of which the grind- 'Ing-rings are driven, as well as a suitable lubricant in which these parts run and by means of which they are effectively protected from excessive friction and wear. The masterwheel, which is indicated at 4, is an internallytoothed gear,which rests and travels upon the base-plate 1 within the flange 3 and. is pro vided at its upper portion with a flange 5, which extends outward over and beyond the flange 3, so as to cover and protect the same.

The master-wheel is held in position or centered by means of three pinions 6, mounted within the oil receptacle or reservoir upon studs 7, fitting in and extending up from recesses or seats 7 a in the base-plate 1, said pin-.

ions meshing with the internal teeth of the master-wheel, as shown in Fig. 7. The studs 7 serve to support a fixed annular pan 8, into which the ground material is discharged from between the grinding-plates, and said annular pan has in its bottom a discharge-opening 9, which registers with a discharge-opening 10 in the bottom plate, this latter opening being surrounded by an upwardly-extending flange or sleeve 11, which prevents the escape of the lubricant, while the discharge-opening of the pan is provided with a downwardly-extending flange or sleeve 12, whichfitswithin the upper end of the sleeve 11 and prevents the ground material from escaping into the lubricant-receptacle. Thepan 8 is provided on its under side with seats or recesses 13, in which the upper ends of the studs 7 fit, and is held in position by bolts 13, which pass through sockets 13*, extending upward from the bottom of the pan. The pan has a bottom flange 13, extending over the top of themaster-gear to protect the space within the same,

while the said gear is provided on its top with an upwardly-extending rib or fillet 13 which further protects said space and prevents water or other liquid from entering the lubricant receptacle. The ground materialis discharged from the pan 8 by means of clearers 13 which are attached to a loose ring 13 ridingv on the inner edge of the pan and operated by means of arms 13 extending downward from the inner grinding-ring, hereinafter described, to

such, for instance, as that shownwhich willpermit longitudinal movement of the corre sponding clutch member and at the same time insure the simultaneous rotation of the two members. The clutch-hub cooperates with a knuckle-piece 17, having at its lower end a.

clutch member 18, which cooperates with the clutch member 16 of the hub 15, the two parts being capable of longitudinal movement relatively to each other while maintaining their engagement. The upper-end of the knucklepiece 17 isformed into a clutch member 19,

which engages with a corresponding clutch member 20 in the form of a-socket formed in the body of the upper grinding-cone 21. The upper end of the knuckle-piece 17 is rounded off or shaped like the segment of a sphere, as indicated at 22, and the bottom of the socket is similarly rounded oif on a greater radius of 1 curvature, as indicated at 23, the body of the socket being of greater diameter than that portion of the knuckle-piece which extends into the same, thus leaving a spacebetween the saidportion and the socket which will permit the grinding-cone 21 to rock upon the knucklepiece, and thus not only properly center itself with respectto the outergrinding-ring, but also in some cases will facilitate the opening of the mill in the manner hereinafter set forth. The grinding-cone 21 has the inner grindingring 24 secured thereto in any suitable manner, and the upper surface of said cone is provided with the usual crushing-teeth 25.

The outer grinding-cone is indicated at 26 and has the outer grinding-ring 27 secured to it in any suitable manner. It is also provided on its under side with a downwardly-extending rib or flange 26", which lies outside the outer edge of the pan 8 and protects the same,

preventing the entrance of water, dirt, &c. This outer grinding-cone is in the shape of a casing, which is hinged at one side to the master-wheel, so as to permit it to be readily swung up and back. The construction which we have devised for this purpose comprises two upwardly-extending'lugs 28, formed or mounted onthemaster-wheel and having short pins'or trunnions 29, extending toward each other. The casing 26 is provided with two projecting arms 30,-each of which has formed in its-inner face a groove 31, open at its rear end and terminating at its front end in a rounding wall, against which the corresponding trunnion 29 fits when the parts are in place. At that side of the master-wheel opposite to the one on which the lugs 28 are located the master-wheel is provided with upwardly-extending lugs 32, and each of these lugs has a bifurcated upper end, between the arms of which is pivoted a bolt 33, provided with a thumb-nut 34. The casing 26 is provided with corresponding lugs 35, which are slotted, as indicated at 36, to receive the corresponding bolt 33. When the parts are in the position shown in Figs. 2 and 3 and the thumb-nuts 34 are turned down, the upper cone or casing is locked to the master-wheel. By loosening the thumb-nuts and turning the bolts outward and downward the front edge of the upper casing may be released, and it may be turned around the trunnions 29 and swung back into the position shown in Fig. 1 to give access to the interior of. the mill. In order to maintain the ,parts .in the position shown in Fig. 1, each arm 30 is provided with a projecting lug 37 and these lugs by their contact with the outer edge of the flange 5 of the master-wheel serve to limit the swinging movement of the outer casing.

The outer casing has attached to it a hopper 38 and is also provided with radial arms 39, which support a central bearing 40. The arms 39 are provided on their under sides with crushing-teeth 41, which cooperate with the crushing-teeth 25 on the inner cone, these latter passing between the former in the manner indicated in Fig. 3. The inner cone 21 is provided with an upwardly-extending hub 42, which passes loosely through a central opening in the bearing 40. The upper end of the hub is formed into a clutch member 43, which engages with a corresponding clutch member with the usual breaker-arms 46, and there is formed through one of said arms and through the hub an oil conduit or passage 47 by means of which the lubricant may): be conducted to the bearing surfaces between the bearing 40 and hub 45. A sleeve 48 has its lower end extending into the upper end of the hub 45 and is provided with a collar 49, by means of which it is supported on the upper end of said hub,qsaid sleeve being provided with'a radial rib 50, having formed therethrough a lubricant conduit or channel 51, provided at its lower end with a nipple 52, which enters theupper end of the lubricant-passage 47. This sleeve 40 and its lubricant-channel extend to or above the top of thehopper 38, and

the sleeve is provided at its upper end with a bearing-disk 53, on which rests a bearing block or washer 54, having a central aperture 55 and radial groove or slot 56. This groove or slot forms a seat for the handle 57 of an adjusting-rod 58, the body of which passes down through the washer 54, sleeve 48, and hubs 45 and 42, the lower end of said rod be-v ing threaded, as indicated at 59, and screwing rotary motion is also imparted to the inner grinding-cone in a direction opposite to that of the outer grinding-cone and at a higher rate of speed, so that the efficiency of the mill is maintained, while at the same time we are enabled to reduce the ratio of gearing between the master-wheel and inner cone,thus lessening the amount of power required for the accomplishment of a given amount of work.

All of the gearing is inclosed and runs in the oil-receptacle and is thereforethoroughly lubricated, and excessive friction and wear are thereby prevented. Ease of operation is further obtained by reason oftlie fact that neither the master wheel nor the central gear is mounted on a fixed bearing, these parts of the gearing being centered or held totheir positions by means of the intermediate pinions. This feature has the advantage of simplicity and lightness, doing away with the usual bearings and facilitating the assembling and taking apart of the gearing. The inner cone maybe readily adjusted with respect to the outer cone by means of the adjusting-rod 58, and in making this adjustment the central gear 14 is not raised or lowered or otherwise displaced relatively to the pinions 6, with which it meshes. In making this adjustment the contact between the knuckle-piece17 and the inner cone is such as to permit the cone to adjust itself so as to bring its grindingring into proper relation to the grinding-ring of the outer cone, thereby compensating automatically for any irregularities or distortions of the parts. Access may be readily had to both the inner and outer cones by unscrewing the thumb-nuts 34, so as to permit the pivoted bolts 33 to be swung outward and downward, whereupon the outer cone or casing may be turned back upon the trunnions and the lubricant-receptacle. The gearing may be readily removed and replaced, if desired, for the reason that, as already pointed out, the master-wheel and central gear are not mounted on fixed bearings, but are loose in the lubricant-receptacle, while the intermediate pinions are mounted on studs, which are clamped between the pan and base 1 and which are consequently readily removable when the pan is removed. If it is desired to inspect or change the grinding-rings, this may be effected by unscrewing the adjusting-rod 58, whereupon the lower cone may be separated from the upper part of the mill and placed in position in the lower part, as indicated in Fig. 1. The grinding-rings are detachably connected to their respective cones, so that they may readily be removed and replaced or other rings substituted therefor. The mill may also be opened without carrying up the inner cone along with the upper part of the mill by first removing the adjusting-rod 58. In this case the hub 42 of the inner cone is made sufficiently short to permit the bearing 40 to slip over it, this operation being facilitated by the tilting or rocking of the inner cone upon the knuckle-piece and by slipping or sliding the casing forward along the trunnions 29 during the upward movement. In fact, the entire construction is 'such that the mill may be readily and quickly taken apart to any desired extent, so far as its operating parts are concerned, and as readily reassembled. If desired, the entire casing, alongwith the parts carried thereby, may be entirely disconnected and removed from the lower parts of the mill by a forward movement of sufficient extent to disengage the trunnions 29 from the grooves 31. The construction is at the same time such that the grinding material and lubricant are kept separate, and the lubricant-receptacle is thus prevented from clogging, while the output is delivered in a cleancondition. The provision of an upward extension of the lubricant-conduit of the upper bearing brings the mouth of the conduit to a point where the lubricant may be readily applied even when the mill is in operation. This also enables us to dispense with the cover for the mouth of the lubricant-conduit, which is required. when said mouth is located down in the hopper and is thereby exposed to the contents thereof.

We do not wish to be understood as limit ing ourselves to the precise details of construction hereinbefore described, and shown in the accompanying drawings, as the same may obviously be modified without departing from the principle of our invention. For instance, instead of the particular form of clutch or coupling which we have shown between the knuckle-piece, central pinion, and inner cone,

and between the hub of'the inner cone and gitudinal motion of the parts up to a certain point and at the same time insure their rotating together.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is.

1. In a grinding-mill, the combination, with a base-plate having a marginal flange which forms an oil-receptacle, of a master-wheel located in said receptacle and provided with internal teeth, an outer grinding-ring mounted on and rotating with said masterwheel,pinions mounted on the base-plate within the receptacle and meshing with the master-wheel, a central gear located in the receptacle and meshing with the pinions, and an inner grindingring connected and rotating with said central gear, substantially as described.

2. In a grinding-mill, the combination, with a base-plate having a marginal flange which forms an oil-receptacle, of a master-wheel located in said receptacle, supported and traveling on the base-plate, and provided with inter nal teeth, an outer grinding-ring mounted on and rotating with said master-wheel, pinions having fixed bearings on the base-plate within the receptacle and meshing with the masterwheel, a central gear resting on the base-plate within the receptacle and meshing with the pinions, and an inner grinding-ring connected to and rotating with said central gear, substantially as described.

3. In a grinding-mill of the character described, the combination, with a master-wheel,

and an outercone or casing mounted on and rotating therewith, of a fixed annular grlstreceivingtrough located between the masterwithin the master-wheel, an inner grindingcone havingaseparable clutch connection with said gearing, and an outer grinding-cone hinged to and rotating with the master-wheel and provided with a bearing which supports the inner grinding-cone, substantially as described.

5. In a grinding-milLthe combination, with a base, of an internally-toothed master-wheel mounted thereon, gearing mounted on the base within the master-wheel, an inner grindingcone having a separable clutch connection with said gearing, and an outer grinding cone hinged to and rotating with the master-wheel and provided with a bearing for the inner grinding-cone, and with means for supporting said inner grinding-cone and adjusting the same vertically relatively to the outer cone, substantially as described.

6. In a grinding-mill, the combination, with a base provided with pinions, and an internallytoothed master-wheel meshing therewith, of a central gear having an upwardly-extending hub provided with a clutch member, an inner grinding-cone, a knuckle-piece havinga clutch -member to engage with that of the gear and having a rocking driving connection with the inner cone, an outer cone hinged to and rotating with the master-wheel and provided with a bearing, the inner cone being provided with a hub extending upward through said bearing and having a clutch member on its upper end, a breaker-hub resting onthe bearingand having a clutch member to engage that of the hub of the inner cone, I a sleeve resting on the breaker-hub, and an adjusting-rod having a bearing on the upper end of the sleeve, extending through the sleeve and through the breaker andinner-cone hubs, and screwing into the knuckle-piece, substantially as described.

7. In agrinding-mill, the combination, with a horizontal master-wheel provided with lugs having trunnions arranged on one side thereof in line and provided at the other side with pivoted bolts having clamping-nuts, of an outer cone provided with arms having grooves to receive said trunnions, said grooves being closed at their inner ends and open at their outer ends, said outer cone being provided on the opposite side with slotted lugs to receive the pivoted bolts, substantially as described. In testimony whereof we aifix our signatures in presence of two witnesses. WM. C. DEARDS.

. WILLIAM E. COPENHAVER.

DOW L. ADELSPERGER. Witnesses:

CLARENCE M. HoLLuNBEoK, v VICTOR Y. SMITH. 

